Except currencies have much bigger market caps, it wouldn't have worked as a currency in that range (outside of a very small economy). We are now in the initial phase where it's being used as a store of value, but sooner or later, it's going to reach roughly it's true value at which point, you would expect it to behave more like a currency rather than an asset with a huge upside.
Currencies don't have market caps, assets have market caps. The fact that people talk about crypto's "market cap" is as clear an indication that it's not and never will be a currency.
